Top 10 Most Expensive Heating Mistakes You’re Making In

With energy prices set to rise again this financial year – following the Australian Energy Regulator’s decision to lift electricity price caps – many households across the Gold Coast and beyond are facing the reality of higher heating bills this winter.

At DEEPCHILL, we believe saving on heating starts with knowing what not to do. We’ve teamed up with insights from CHOICE home heating expert Chris Barnes, to walk you through the most common heating mistakes that could be blowing out your bills and what you can do instead.

1. Believing expensive = Better

One of heating mistakes is when many people assume that pricier heaters or air conditioners must perform better – but that’s not always the case. According to CHOICE testing, some of the most expensive electric heaters performed poorly, while some lower-cost options (under $100) delivered surprisingly efficient results.

✅ DEEPCHILL tip: Before buying a unit, check independent reviews or consult an HVAC expert. Price doesn’t always reflect performance.

2. Ignoring running costs

Buying cheap can be expensive in the long run. In CHOICE testing, running costs for heaters over one winter varied by more than $300 – depending on size, design, and efficiency.

✅ DEEPCHILL tip: Always check the energy rating label and estimated yearly running cost before buying. Need help calculating what’s best for your space? Just ask us – we do this every day for our Gold Coast customers.

3. Not using your ceiling fan in reverse

Hot air rises – which means it collects up high where it does you no good. Switching your ceiling fan to reverse mode (clockwise in winter) helps push warm air back down into the room, allowing your heater or air conditioner to work more efficiently.

✅ DEEPCHILL tip: Use your reverse-cycle AC with a ceiling fan for optimal heat distribution. It’s one of the simplest air conditioning tips and tricks for winter.

4. Not using your air conditioner for heating

Think air conditioning is just for summer? That’s is one of heating mistakes you rarely realize. Reverse-cycle air conditioners are one of the most efficient heating methods available, often cheaper to run than electric heaters over time.

✅ DEEPCHILL tip: If you already have a reverse-cycle unit, use it for heating. And if you’re considering an upgrade, we can help you choose a model that suits your space and budget.

5. Cranking up the thermostat

Every extra degree can add around 10% to your heating bill. Experts recommend setting your air conditioner around 8°C above the outdoor temperature for the most efficient performance.

✅ DEEPCHILL tip: Instead of setting your air con to 26°C, try 21–22°C and layer up with clothing or blankets. Small changes make a big difference over winter.

6. Skipping maintenance

Dusty filters and clogged internal parts force your system to work harder – which burns more power. Regular cleaning and maintenance can significantly improve efficiency.

✅ DEEPCHILL tip: Clean filters every 1–2 months during high-use seasons. Better yet, book a professional service – DEEPCHILL offer tailored air conditioning maintenance for Gold Coast homes and businesses.

7. Drying clothes on or in front of your heater

It might feel cosy, but drying clothes this way restricts airflow and causes your unit to overwork. It’s also a fire hazard.

✅ DEEPCHILL tip: Dry laundry in a well-ventilated room instead. Don’t block vents or drape anything over heaters or indoor air con units.

8. Ignoring draughts

Even the best heater struggles when cold air seeps in through gaps under doors and windows. According to CHOICE, sealing draughts can significantly cut energy loss.

✅ DEEPCHILL tip: Use weather seal tape, door snakes, or silicone sealant to close up gaps. Don’t forget to check floorboards, too.

9. Forgetting about insulation

Did you know that 25–35% of your home’s heat could be escaping through the roof if it’s uninsulated? That’s money literally flying out the ceiling.

✅ DEEPCHILL tip: If your home doesn’t have ceiling or underfloor insulation, now is the time. We can connect you with trusted local partners for insulation upgrades.

10. Not budgeting for higher bills

Energy prices are rising. Even with the Energy Bill Relief Fund offering rebates up to $150 for eligible households from July 2025, bills can still creep up fast if your heating use is inefficient.

✅ DEEPCHILL Tip: Review your usage weekly, and budget for an extra buffer in winter. Using an efficient system + smart habits = lower surprise bills.